1. Introduction
The VIISAN S21 is a versatile A2/A3 large format overhead scanner designed for efficient digitization of various documents, books, and 3D objects. Featuring a 23-megapixel high-resolution camera, it captures detailed images and offers advanced software functionalities such as automatic flattening of curved pages, fingerprint removal, multi-language Optical Character Recognition (OCR), and video recording capabilities. This manual provides comprehensive instructions for setting up, operating, and maintaining your VIISAN S21 scanner.
2. Key Features
- Large Format Scanning: Supports scanning areas up to A2 size (594x420 mm), ideal for journals, manuscripts, newspapers, maps, and blueprints.
- High Resolution: Equipped with a 23MP image sensor, providing excellent output resolution of 5504x4128 pixels for capturing fine details.
- Adjustable Height: Features an adjustable height design for A2/A3 scanning and a 90-degree foldable hinge for portability and storage.
- SmartBook Curved Page Flattening: Automatically flattens curved pages of books and removes finger images during scanning.
- Fast Scanning Speed: Achieves scanning speeds of up to 1.5 seconds per page.
- Integrated LED Lighting: Built-in high-brightness LED lamp with 3-level touch control ensures clear images in various lighting conditions.
- Powerful OCR: Converts scanned images into searchable PDF and editable Word, Excel, and Text formats, supporting over 130 languages.
- Advanced Image Processing: Includes automatic cropping, de-skewing, punch hole removal, background purification, automatic edge filling, automatic text orientation, watermarking, color enhancement, and both-side merge for business cards.
- Video Recording: Supports live demonstration and video recording up to 1920x1080@30fps quality.
- Visualizer Function: Allows projection of scanned content to a large screen or TV for presentations.
- Compatibility: Fully compatible with Windows and macOS operating systems.
3. Package Contents
Please check the package contents upon unboxing to ensure all items are present:
- VIISAN S21 Scanner Unit
- USB Cable
- Scanning Mat (Black)
- External Shutter Button (for specific models/functions)
- Software Installation Guide / CD (or download link)
- Quick Start Guide
4. Setup
Follow these steps to set up your VIISAN S21 scanner:
- Unpack the Scanner: Carefully remove all components from the packaging.
- Position the Scanning Mat: Place the black scanning mat on a flat, stable surface where you intend to use the scanner. Ensure it is free from wrinkles.
- Place the Scanner: Position the VIISAN S21 scanner unit on the designated area of the scanning mat.
- Connect USB Cable: Connect one end of the provided USB cable to the USB Type-B port on the scanner base and the other end to an available USB port on your computer.
- Install Software: Insert the software CD into your computer's drive or download the latest VIISAN OfficeCam software from the official VIISAN website. Follow the on-screen instructions to complete the installation.
- Adjust Height: The scanner arm can be adjusted to accommodate A2 or A3 size documents. Gently pull or push the arm to the desired height.
- Power On: The scanner typically powers on automatically once connected to the computer and the software is launched.

5. Operating Instructions
The VIISAN S21 scanner is operated through the VIISAN OfficeCam software installed on your computer.
5.1. Basic Document Scanning
- Launch Software: Open the VIISAN OfficeCam application on your computer.
- Place Document: Place the document you wish to scan flat on the black scanning mat, ensuring it is within the camera's view.
- Adjust Scanner Height: If scanning different sized documents (A2, A3, A4, etc.), adjust the scanner arm height to ensure the entire document fits within the preview window in the software.
- Initiate Scan: Click the 'Scan' button within the software interface or use the external shutter button (if provided with your model) to capture the image.
- Save/Process: The scanned image will appear in the software. You can then save it, apply image processing features, or convert it using OCR.
5.2. Scanning Thick Books and Curved Pages
The S21 is designed to handle thick books up to 80mm in height, utilizing advanced technology to ensure optimal results.
- Place Book: Open the book and place it face-up on the scanning mat.
- Auto Flattening Curve Technology: The software automatically detects and corrects page curvature, transforming a curved book page into a flat, readable image.
- Finger Erase: The software can automatically detect and erase finger images if you hold down the pages during scanning.
- Page-Turning Detection: This feature automatically starts a scan when a page is turned, allowing for continuous scanning of multiple pages in a book.


5.3. Scanning Multiple Cards and 3D Objects
- Multiple Cropping & Deskewing: Place several small items like business cards on the mat. The software can automatically crop and deskew each card into separate files.
- 3D Object Recording: The scanner can capture images of 3D objects, making it suitable for live demonstrations or archiving physical items.

5.4. Image Processing Features
The VIISAN OfficeCam software offers a suite of tools to enhance your scanned images:
- Automatic Cropping & De-skewing: Corrects the orientation and boundaries of scanned documents.
- Punch Hole Removal: Eliminates punch holes from the edges of documents.
- Background Purification: Enhances text and reduces shadows by purifying the background.
- Automatic Edge Filling: Fills in damaged edges with a clean background.
- Automatic Text Orientation: Rotates pages based on text orientation.
- Add Watermark: Apply watermarks to important documents.
- Color Enhanced: Brightens and improves the quality of scanned images.
- Both-Side Merge: Scans both sides of a business card and merges them together.

5.5. OCR Text Recognition
The embedded Optical Character Recognition (OCR) engine allows you to convert scanned images into editable text formats.
- Supported Formats: Convert images to searchable PDF, editable Word, Excel, and Text formats.
- Multi-Language Support: Supports more than 130 languages for text recognition.

5.6. Barcode Recognition
The software includes a barcode recognition function that can identify barcodes and QR codes, outputting the data directly into an Excel file format.

5.7. Video Recording and Visualizer Function
- Video Recording: The OfficeCam software provides a video recording function, allowing you to record live demonstrations or presentations at Full HD (1920x1080@30fps) quality.
- Visualizer Function: Use this feature to project your laptop screen content, including live scanner feed, to a larger display like a TV for meetings or educational purposes.

5.8. LED Lighting Control
The scanner features a built-in 3-level LED lamp to ensure optimal lighting for your scans.
- Touch Control: Adjust the brightness of the LED lamp using the touch control on the scanner base.
- Environment Adaptation: The smart multi-level lighting allows you to adjust brightness according to the ambient environment, ensuring clear photos even in the dark.

6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your VIISAN S21 scanner.
- Cleaning the Lens: Use a soft, lint-free cloth, preferably a microfiber cloth, to gently wipe the camera lens. Avoid using abrasive cleaners or solvents.
- Cleaning the Scanner Body: Wipe the exterior of the scanner with a soft, dry cloth. For stubborn marks, a slightly damp cloth can be used, followed by a dry cloth.
- Cleaning the Scanning Mat: The black scanning mat can be wiped clean with a damp cloth and mild soap if necessary. Ensure it is completely dry before use.
- Software Updates: Regularly check the VIISAN official website for software updates to ensure you have the latest features and bug fixes.
- Storage: When not in use, fold the scanner arm down and store it in a clean, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
Here are some common issues and their solutions:
- Scanner Not Detected:
- Ensure the USB cable is securely connected to both the scanner and the computer.
- Try connecting to a different USB port on your computer.
- Restart the VIISAN OfficeCam software and your computer.
- Verify that the scanner drivers are correctly installed.
- Poor Image Quality:
- Ensure the camera lens is clean and free from dust or smudges.
- Adjust the LED lighting using the touch control on the base to suit the ambient light.
- Make sure the document is placed flat on the scanning mat and is not wrinkled.
- Check the scanner's height adjustment to ensure the document is fully in focus.
- Software Not Responding:
- Close and restart the VIISAN OfficeCam software.
- Ensure your computer meets the minimum system requirements for the software.
- Check for and install any available software updates.
- Scanned Text is Not Editable (OCR Issue):
- Ensure the document is well-lit and clearly visible to the camera.
- Select the correct language for OCR in the software settings.
- For best results, use clear, printed text. Handwriting OCR may vary in accuracy.
8. Specifications
| Feature | Detail |
|---|---|
| Brand Name | VIISAN |
| Model Number | S21 |
| Product Type | High-speed Camera / Document Scanner |
| Scan Element Type | CMOS |
| Optical Resolution | 300*300 dpi |
| Scan Speed | 100 scans/second (up to 1.5 seconds per page) |
| Colour Depth | 24 Bit |
| Interface Type | USB 2.0 |
| Scanning Light Source | LED (3-level touch control) |
| Scan Breadth | A2/A3 (Max. 594x420 mm) |
| Max. Resolution | 23MP (5504x4128 pixels) |
| Max. Book Thickness | Up to 80mm |
| Dimensions (Extended) | Approx. 210mm (W) x 112mm (D) x 475mm (H) |
| Dimensions (Folded) | Approx. 210mm (W) x 112mm (D) x 385mm (H) |
| Weight | 2.5 kg |
| Origin | Mainland China |
| Certification | NONE |
| Software | VIISAN OfficeCam (Windows & macOS compatible) |
| OCR Languages | Supports >130 languages |

9. User Tips
- Maximize Book Scanning: For optimal book scanning, utilize the auto-flattening feature to correct page curves and the page-turning detection for continuous scanning. The external shutter button (if included with your model) can also facilitate this process.
- Clarity for Fine Print: The 23MP high-resolution camera ensures that even fine print and handwriting can be scanned with clarity and enlarged significantly without loss of detail.
- Use the Black Mat: Always use the included black scanning mat to provide a consistent background, which helps the software accurately detect document edges and improve image processing.
- Video Demonstrations: Leverage the video recording function for live demonstrations or tutorials, especially useful in educational or professional settings.
10. Warranty and Support
The VIISAN S21 scanner comes with a 1-year warranty from the date of purchase. For technical support, troubleshooting assistance, or warranty claims, please refer to the contact information provided with your product documentation or visit the official VIISAN website.





